Tap.



, Patented may as, 190:. fl. H. MEGS.

TAP. (Application filed Nov. 15, 1900.)

(No Model.)

UNTTEn STATES aTnNT @rrrcn.

ADDISON II. RIGGS, OF ASBURY PARK, NEYV JERSEY.

TAP.

SPECIFIOATION forming part Of Letters Patent NO. 678,814, dated July 16, 1901. Application filed November 15,1900. Serial No. 36,542. (No model.)

To aZZ whom it may concern.-

Be it known that I, ADDISON H. RIGGS, a citizen of the United States, residing in Asbury Park, in the county of Monmouth and State of New Jersey, have invented certain new and useful Improvements in Taps, of which the following is a specification.

This invention relates to an improvement in taps designed more particularly for use with nut-tapping machines, although it may be employed for other purposes.

Primarily the object of the invention is the production of a tap having a long stem and a shank located at an angle to the working portion of the tap, over which stem and shank the nuts, after being threaded by the tap, pass and are delivered successively from the end of said shank.

A further object of the invention is the provision of a tap made separate from its shank and having a stem, the pitch or inclination of the thread of which is reverse to that of the thread of said tap and the shank having a socket with an internal thread for the reception of said stem.

A further object of the invention is the provision of a tap having a reduced end for the reception of a feed-rod upon which nutblanks may be strung and fed by gravital action or in other ways to the cutting portion of said tap.

In the accompanying drawings, Figure l is a side elevation of my improved tap, showing the angular shank thereof. Fig. 2 is a similar view of the tap, on an enlarged scale, the shank being broken away. Fig. 3 is a side elevation of the tap, showing a stem by which it may be detachably connected with its shank. Fig. 4 is a detail view, partially in section and partially in elevation, of a portion of the tap, showing a tube or feed-rod upon which nutblanks may be placed, as applied to a reduced end of said tap.

Referring to the drawings, the numeral 10 designates in a general way my improved tap, which has a straight portion 10, carrying the usual thread or cutting surface 10 and is provided with a shank 10, extending, in the exemplification given, at about right angles to said Vertical portion, although it may be disposed at a different angle, if desired, without departure from the invention.

Located above the thread of the tap or what is known as the tap proper (which maybe of any conventional form) is a reamer 12 for reaming out all imperfections on the inner sides of the nut-blanks, and thereby producing a bore with smooth walls in each blank for the working portion 10 of the tap to act upon in forming the thread. This reamer, while not absolutely essential, is useful for the purpose stated, and it may, if desired, be omitted without departure from the invention. In the illustrations given the end of the reaming portion of the tap is reduced, as at 12, to receive the tubular extremity of a feed-rod 13, upon which nut-blanks to be operated upon by the tap may be strung, said blanks being designated by the numeral 14: in Fig. 4.

Adjacent to its angular portion the shank of the tap is preferably curved, as at 10 to enable the nuts after they leave the tap proper to pass easily upon the shank 10 While the tap and its shank may be formed integral, if desired, I prefer to form them in separate sections, the tap proper being provided with a stem 15, having a thread thereon. In the illustrations this stem is shown as of tapering form; but it is distinctly to be understood that it may be of different shape without departure from the invention. In practice the thread of this stem is to be of reverse pitch or inclination to that of the thread of the tap proper, so that should either the tap or the nut-blanks be rotated there will be no tendency of the stem to unscrew or become detached from the shank. At its upper end the shank is provided with a socket 16, interiorly threaded to receive the shank 15 of the tap. Other means may, however, be employed for detachably uniting the shank and tap without departure from the invention.

My improved tap is particularly designed for use in connection with a nut-tapping ma chine of the character set forthin my Patent No. 662,965, dated December 4, 1900, in which the nut-blanks are strung upon the feed-rod 13 and are fed by gravital action to a nut- ISO driver, in-Which the tap is concentrically disposed, said nut-driver being interiorly shaped to engage the nut-blanks and guide them along and rotate them about the tap, and said nut-blanks, as they leave the tap proper, being fed along the shank of the tap and delivered successively from the end thereof.

My invention is not, however, limited to the use just specified, for, as is obvious, it may be employed in other relations, and the tap may be rotated to cause it to thread the nut-blanks instead of rotating said nut-blanks around the tap by the driver, as in my application aforesaid.

While the feed-rod 13 may either be tubular or solid, as desired, I prefer to form it tubular, so that oil or other suitable lubricant may be fed thereto to aid the tap in accomplishing its work.

Many changes may be made in the form and proportions of the tap and its shank without departing from my invention, which is not limited to the precise construction illustrated and described.

Having thus described my invention, What I claim is- 1. A tap having a shank located at an angle to the tap proper, said shank being adapted to receive the nuts delivered from the tap.

2. A tap having a straight portion on which the cutting-thread is formed and a shank located at an angle to said straight portion and receiving the nuts therefrom.

3. A tap having a straight portion provided with a reamer and with acutting-thread, said tap having a deflected shank over which the nuts pass.

4. A tap having a reduced end, combined with a feed-rod upon which the nut-blanks are strung.

5. In a tap, the combination, with the tap proper having a stem provided with a thread of reverse inclination to the cuttingethread of the tap, of a deflected shank in which said stem is fitted.

6. The combination, with a deflected shank having an interiorly-threaded socket, of a tap having a threaded stem of reverse pitch or inclination to that of its cutting-thread, said stem being inserted in said socket.

7. A tap having a threading portion and a deflected shank, said shank being detachably connected with the threading portion and adapted to receive the nuts.

8. A tap having a reaming-surface at one end provided with a reduced extremity for the reception of a feed-rod upon which nutblanks are strung, a thread-forming portion, and a shank located at an angle to said thread-forming portion.

9. A tap having a reamer provided with a reduced end for the reception of a feed-rod, and a deflected shank having a curve intermediate its length.

ADDISON H. RIGGS. Witnesses:

HARRY M. ERVIEN, RANDOLPH Ross. 

